Our Products

Merit Lining Systems uses a range of materials which adhere to standards and follow testing procedures to ensure that our products are of a high standard. The standards of our products are outlined in the expandable tables below. Descriptions of the materials available can be found by following the links given below.

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Materials

We supply different materials for different purposes. Ranging from cheaper materials for personal projects or short term applications to more durable materials for long term applications or specialised projects!

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Applications

Geomembranes have a wide range of uses, ranging from small scale to large scale applications, we can supply you with what you need to help you with your project. Click the link below to read more about uses of our products.

Our Partners

We have partnered with various reputable companies to ensure that our clients receive the best service alongside the guarantee that they are receiving only the best quality products. Should you wish to know more about these companies, you can visit their website by clicking on the company logos below.

GM13 HDPE Textured

Properties Test Method Test Value Testing Frequency (minimum)
1.00 mm 1.50 mm 2.00 mm
Thickness mils (min. ave) D 5994 Nom. (-5%) Nom. (-5%) Nom. (-5%) per roll
- lowest individual for 8 out of 10 values -10% -10% -10%
- lowest individual for any of the 10 values -15% -15% -15%
Asperity Height mils (min. Ave.) (1) D 7466 0.25 mm 0.25 mm 0.25 mm every 2nd roll (2)
Density (min. ave.) D 1505/D 792 0.940 g/cc 0.940 g/cc 0.940 g/cc 90,000 kg
Tensile Properties (min. ave.) (3) D 6693 9,000 kg
- Yield strength Type IV 15 kN/m 22 kN/m 29 kN/m
- Break strength 8 kN/m 16 kN/m 21 kN/m
- Yield elongation 12.00% 12.00% 12.00%
-Break elongation 100.00% 100.00% 100.00%
Tear Resistance (min. ave.) D 1004 125 N 187 N 249 N 20,000 kg
Puncture resistance (min. ave.) D 4833 267N 400 N 534 N 20,000 kg
Stress Crack Resistance (4) D 5397 (App.) 300 hr 300 hr 300 hr per GRI GM10
Carbon Black Content (range) D 1603 (5) 2.0-3.0 % 2.0-3.0 % 2.0-3.0 % 9,000 kg
Carbon Black Dispersion D 5596 Note (6) Note (6) Note (6) 20,000 kg
Oxidative Induction Time (OIT) (min. ave.) (7) 90,000 kg
(a) Standard OIT (min. ave.) - %retained after 90 days D 3895 100 min. 100 min. 100 min.
or
(b)High Pressure OIT (min. ave.) - %retained after 90 days D 5885 400 min. 400 min. 400 min.
Oven Aging at 85C (7), (8) D 5721 per each formulation
(a) Standard OIT (min. ave.) - %retained after 90 days D 3895 55.00% 55.00% 55.00%
or
(b)High Pressure OIT (min. ave.) - %retained after 90 days D 5885 80.00% 80.00% 80.00%
UV resistance (9) GM11 per each formulation
(a) Standard OIT (min. ave) D 3895 N.R (10) N.R (10) N.R (10)
or
(b)High Pressure OIT (min. ave.) - %retained after 1600 hrs (11) D 5885 50.00% 50.00% 50.00%

(1) Of 10 readings; 8 out of 10 must be ≥ 0.18 mm, and lowest individual reading must be ≥ 0.13 mm; also see Note 6.
(2) Alternate the measurement side for double sided textured sheet
(3) Machine direction (MD) and cross machine direction (XMD) average values should be on the basis of 5 test specimens each direction.
Yield elongation is calculated using a gage length of 33 mm
Break elongation is calculated using a gage length of 50 mm
(4) The SP-NCTL test is not appropriate for testing geomembranes with textured or irregular rough surfaces. Test should be conducted on smooth edges of textured rolls or on smooth sheets made from the same
formulation as being used for the textured sheet materials.
The yield stress used to calculate the applied load for the SP-NCTL test should be the manufacturer’s mean value via MQC testing.
(5) Other methods such as D 4218 (muffle furnace) or microwave methods are acceptable if an appropriate correlation to D 1603 (tube furnace) can be established.
(6) Carbon black dispersion (only near spherical agglomerates) for 10 different views:
9 in Categories 1 or 2 and 1 in Category 3
(7) The manufacturer has the option to select either one of the OIT methods listed to evaluate the antioxidant content in the geomembrane.
(8) It is also recommended to evaluate samples at 30 and 60 days to compare with the 90 day response.
(9) The condition of the test should be 20 hr. UV cycle at 75°C followed by 4 hr. condensation at 60°C.
(10) Not recommended since the high temperature of the Std-OIT test produces an unrealistic result for some of the antioxidants in the UV exposed samples.
(11) UV resistance is based on percent retained value regardless of the original HP-OIT value.

GM13 HDPE Smooth

Properties Test Method Test Value Testing Frequency (minimum)
0.75 mm 1.00 mm 1.50 mm 2.00 mm
Thickness mils (min. ave) D 5199 Nom. (-5%) Nom. (-5%) Nom. (-5%) Nom. (-5%) per roll
- lowest individual of 10 values -10% -10% -10% -10%
Density (min.) D 1505/D 792 0.940 g/cc 0.940 g/cc 0.940 g/cc 0.940 g/cc 90,000 kg
Tensile Properties (min. ave.) (1) D 6693 9,000 kg
- Yield strength Type IV 11 kN/m 15 kN/m 22 kN/m 29 kN/m
- Break strength 20 kN/m 27 kN/m 40 kN/m 53 kN/m
- Yield elongation 12.00% 12.00% 12.00% 12.00%
-Break elongation 700.00% 700.00% 700.00% 700.00%
Tear Resistance (min. ave.) D 1004 93 N 125 N 187 N 249 N 20,000 kg
Puncture resistance (min. ave.) D 4833 240 N 320 N 480 N 640 N 20,000 kg
Stress Crack Resistance (2) D 5397 (App.) 300 hr 300 hr 300 hr 300 hr per GRI GM10
Carbon Black Content % D 1603 (3) 2.0-3.0 % 2.0-3.0 % 2.0-3.0 % 2.0-3.0 % 9,000 kg
Carbon Black Dispersion D 5596 Note (4) Note (4) Note (4) Note (4) 20,000 kg
Oxidative Induction Time (OIT) (min. ave.) (5) 90,000 kg
(a) Standard OIT D 3895 100 min. 100 min. 100 min. 100 min.
or
(b)High Pressure OIT D 5885 400 min. 400 min. 400 min. 400 min.
Oven Aging at 85C (5), (6) D 5721 per each formulation
(a) Standard OIT (min. ave.) - % retained after 90 days D 3895 55.00% 55.00% 55.00% 55.00%
or
(b)High Pressure OIT (min. ave.) - % retained after 90 days D 5885 80.00% 80.00% 80.00% 80.00%
UV resistance (7) per each formulation
(a) Standard OIT (min. ave) D 3895 N.R (8) N.R (8) N.R (8) N.R (8)
or
(b)High Pressure OIT (min. ave.) - % retained after 1600 hrs (9) D 5885 50.00% 50.00% 50.00% 50.00%

(1) Machine direction (MD) and cross machine direction (XMD) average values should be on the basis of 5 test specimens each direction
Yield elongation is calculated using a gage length of 33 mm
Break elongation is calculated using a gage length of 50 mm
(2) The yield stress used to calculate the applied load for the SP-NCTL test should be the manufacturer’s mean value via MQC testing.
(3) Other methods such as D 4218 (muffle furnace) or microwave methods are acceptable if an appropriate correlation to D 1603 (tube furnace) can be established.
(4) Carbon black dispersion (only near spherical agglomerates) for 10 different views:
9 in Categories 1 or 2 and 1 in Category 3
(5) The manufacturer has the option to select either one of the OIT methods listed to evaluate the antioxidant content in the geomembrane.
(6) It is also recommended to evaluate samples at 30 and 60 days to compare with the 90 day response.
(7) The condition of the test should be 20 hr. UV cycle at 75°C followed by 4 hr. condensation at 60°C.
(8) Not recommended since the high temperature of the Std-OIT test produces an unrealistic result for some of the antioxidants in the UV exposed samples.
(9) UV resistance is based on percent retained value regardless of the original HP-OIT value.

GM17 LLDPE Smooth

Properties Test Method Test Value Testing Frequency (minimum)
0.5mm 0.75 mm 1.00 mm 1.50 mm 2.00 mm
Thickness mils (min. ave) D 5199 Nom. (-5%) Nom. (-5%) Nom. (-5%) Nom. (-5%) Nom. (-5%) per roll
- lowest individual of 10 values -10% -10% -10% -10% -10%
Density g/ml (max.) D 1505/D 792 0.939 0.939 0.939 0.939 0.939 90,000 kg
Tensile Properties (min. ave.) (1) D 6693 9,000 kg
- Break strength Type IV 13 N/mm 20 N/mm 27 N/mm 40 N/mm 53 N/mm
-Break elongation 800.00% 800.00% 800.00% 800.00% 800.00%
2% Modulus – N/mm (max.) D 5323 210 N/mm 370 N/mm 420 N/mm 630 N/mm 840 N/mm Per formulation
Tear Resistance (min. ave.) D 1004 50 N 70 N 100 N 150 N 200 N 20,000 kg
Puncture resistance (min. ave.) D 4833 120 N 190 N 250 N 370 N 500 N 20,000 kg
Axi-Symmetric Break Resistance Strain (min.) D 5617 30.00% 30.00% 30.00% 30.00% 30.00% Per formulation
Carbon Black Content % D 1603 (3) 2.0-3.0 % 2.0-3.0 % 2.0-3.0 % 2.0-3.0 % 2.0-3.0 % 20,000 kg
Carbon Black Dispersion D 5596 Note (3) Note (3) Note (3) Note (3) Note (3) 20,000 kg
Oxidative Induction Time (OIT) (min. ave.) (4) 90,000 kg
(a) Standard OIT D 3895 100 min. 100 min. 100 min. 100 min. 100 min.
or
(b)High Pressure OIT D 5885 400 min. 400 min. 400 min. 400 min. 400 min.
Oven Aging at 85C (5) D 5721 per each formulation
(a) Standard OIT (min. ave.) - %retained after 90 days D 3895 35.00% 35.00% 35.00% 35.00% 35.00%
or
(b)High Pressure OIT (min. ave.) - %retained after 90 days D 5885 60.00% 60.00% 60.00% 60.00% 60.00%
UV resistance (6) per each formulation
(a) Standard OIT (min. ave) D 3895 N.R (7) N.R (7) N.R (7) N.R (7) N.R (7)
or
(b)High Pressure OIT (min. ave.) - %retained after 1600 hrs (8) D 5885 35.00% 35.00% 35.00% 35.00% 35.00%

 

(1) Machine direction (MD) and cross machine direction (XMD) average values should be on the basis of 5 test specimens each direction.
• Break elongation is calculated using a gage length of 50 mm at 50 mm/min.
(2) Other methods such as D 4218 (muffle furnace) or microwave methods are acceptable if an appropriate correlation to D 1603 (tube furnace) can be established.
(3) Carbon black dispersion (only near spherical agglomerates) for 10 different views:
• 9 in Categories 1 or 2 and 1 in Category 3
(4) The manufacturer has the option to select either one of the OIT methods listed to evaluate the antioxidant content in the geomembrane.
(5) It is also recommended to evaluate samples at 30 and 60 days to compare with the 90 day response.
(6) The condition of the test should be 20 hr. UV cycle at 75°C followed by 4 hr. condensation at 60°C.
(7) Not recommended since the high temperature of the Std-OIT test produces an unrealistic result for some of the antioxidants in the UV exposed samples.
(8) UV resistance is based on percent retained value regardless of the original HP-OIT value.