Black Smooth HDPE Dam Liner

In agricultural reservoirs, irrigation ponds and fish and shrimp farms, water leaks directly lead to losses Low-cost films tear after just one season or quickly decompose due to UV radiation We tested seven types of low-cost geosynthetic waterproofing membranes labeled as "pond liners" Five showed significant damage after 12 months outdoors, and four showed tensile strengths below 10 kN/m-far below the recommended 18 kN/m for reliable protection against leaks Our black smooth HDPE dam membranes are made from 100 % virgin HDPE resin without the use of recycled materials They are available in thicknesses ranging from 0.3 mm to 1.5 mm and have tensile strengths of over 18 kN/m and over 700 % elongation. The black carbon blend provides excellent UV resistance (ASTM G154, over 90 % residual strength even after 1000 hours) In independent laboratory tests, even after 24 months of continuous use in water (under simulated pond conditions), no cracks or swelling occurred, and the permeability coefficient remained below 1×10 ⁻ ¹ ² cm/s. This is less than one tenth of the value of typical PVC films. The Material is ideal for fish farms, shrimp ponds, dam surfacing and agricultural reservoirs.


Let's be honest. Walk around any site and you'll see it. Most black liners look exactly the same. Why? A lot of suppliers dye them pitch-black just to hide junk recycled waste. We don't do that. We stick to a strict quality floor. We buy premium high-density resin. The density hits $\ge 0.94\text{ g/cm}^3$. It meets the industry GRI GM13 standard right away. When your core material is stable, your performance stays consistent. That gives you real peace of mind on the job.

Why make it black then? We mix in 2% to 3% fine carbon black. Think of it as sunscreen for the liner. It blocks UV damage. It isn't cosmetic cover-up. We put it through a brutal 1,000-hour UV aging test (ASTM G154). Guess what? It keeps $\ge 92\%$ of its strength. It works like armor against farm chemicals, acids, and salts. For outdoor projects, this is the hassle-free durability you actually need.

Look at the real numbers. I always tell people to check the data. We ran a nasty test on our April 2026 run, batch HD-0426-09. We dropped the 0.5mm liner into 60°C water. We left it there for 180 days. Most cheap liners lose their puncture resistance in 90 days. They drop below 80%. Not this batch. It started at $\ge 310\text{ N}$. It came out of that hot tank at $\ge 285\text{ N}$. That is 91.9% strength retention. You want long-term hot-water performance? This specific batch report proves it.

Fish and shrimp are fragile. Everyone in aquaculture knows this. Water quality is your whole livelihood. I've seen guys ruin a whole pond with bad plastic. Our liner has zero toxic leaching. It keeps your fish safe. Most farms grab our 0.3mm, 0.5mm, or 0.75mm options. The surface is smooth. Gunk and algae can't stick to it. Cleaning takes half the time. Shrimp farms in Ecuador use it. Fish ponds in Vietnam and trout farms in Norway use it too. It just works.

A good liner is useless if your crew hates laying it. Slow welding kills your schedule. This material bonds easily with hot wedge or extrusion tools. The seam strength hits $\ge 80\%$ of the main sheet. It melts into one solid piece. We ship these in 7-meter widths. Think about your next project. Wider rolls mean fewer seams to weld. It cuts your installation time by 30%. Less time welding, less money spent on labor. Why do it the hard way?

You also want to ask：
"I need a liner for my 2‑acre fish pond – what thickness is best?"

→ For fish or shrimp farming, 0.5mm is most common (good balance of cost and durability). For larger catfish or tilapia with more activity, go with 0.75mm. We can send free samples of both.

"How long will a 0.5mm HDPE liner last in direct sun?"

→ With 2‑3% carbon black, UV life is 15‑20 years exposed. Buried or submerged, 50+ years. Our 1000h UV test shows >90% strength retention – equivalent to 5+ years of real tropical sun.

"Can I use this liner for a drinking water reservoir?"

→ Yes. Virgin HDPE is FDA‑compliant (21 CFR 177.1520) and safe for potable water. No leachates. Recommended thickness 0.75mm or above.

"Do you have test reports for chemical resistance – especially ammonia from shrimp waste?"

→ Yes. We have immersion test data for 10% ammonium hydroxide (30 days, 40°C) showing no change in tensile or puncture. Available upon request.

"What's your MOQ and lead time for Ecuador?"

→ MOQ 5,000 m². Lead time 15‑20 days after deposit. We ship to Guayaquil port monthly. Sample (A4) free, shipping cost only.

Equipment：



Internal Links
Impermeable PVC Pond Liner
Lightweight PVC Pond Liner
Collapsible PVC Flexible Pond Liner

Hot Tags: black smooth hdpe dam liner, China black smooth hdpe dam liner manufacturers