Bentonite Waterstop Strips Price — Price Guide & Wholesale Channels

Aohong Sales · Latest update — Sep 2025

Dear customers and partners, I’m Liu Feng, Sales Manager of Aohong Rubber & Plastic. August to October is the peak time for buying in underground projects each year. The single most frequent question we receive is: “How much do bentonite waterstop strips cost?” This guide offers the latest market updates, price comparison tips, and ways to save money. It shows how, for the same budget, choosing Aohong can add an extra 20 km of leak-free tunnels.

1. Market average prices — Sep 2025 (tax included, freight excluded)

Category Size (W × T) Unit National Average (CNY)*

• Putty-type water-swelling strip (self-adhesive) 20×15 mm per meter: 3.8–4.2 CNY ↑ 3%

• Manufactured bentonite waterstop strips 30×20 mm per meter: 6.5–7.2 CNY ↑ 5%

• Steel-edged rubber waterstop (rubber waterbar) 350×8 mm per meter: 48–55 CNY ↑ 6%

• Self-adhesive mesh water-swelling strip 25×18 mm per meter: 5.0–5.5 CNY ↑ 4%

*Sample basis: August transaction data from 17 major wholesalers in Jing-Jin-Ji and the Yangtze Delta, along with listings on 1688 and HC360. Prices include 13% VAT but exclude freight.

2. Why we can beat the market’s average

• Raw Material Central Procurement:

  • Annual framework agreements with Sinopec and LANXESS.

  • Direct buying of rubber additives cuts raw material costs by 6–8%.

• Production scale: Two bases in Hebei and Shandong produce a daily output of 180,000 m, which dilutes fixed costs.

• Flat channels: The sales department sells directly to projects. This avoids the 8–10% markups from provincial distributors.

• Logistics subsidy: We have third-party deals with Debang, SF, and JD for full-truck direct delivery to the site. This saves us 0.15 to 0.25 CNY per meter.

(According to company policy, we need project drawings and a bill of quantities sent privately for the final quote. But we guarantee that for “same material & same specs,” our price will be at least 5% lower than the market average.)

3. How to compare prices and buy real “value for money.”

Check the “Three Certificates + One Report.”

1. Rubber composition test report (ASTM D2000 or GB/T 18173.3)

2. Swelling ratio test (24 h in distilled water, ≥ 220%)

3. Water pressure resistance test (0.6 MPa, 30 min — no leakage)

4. Environmental / non-toxic report (RoHS 2.0 / REACH)

If any item is missing, don’t buy it even if the price is low.

Calculate the landed unit cost.

Waterstops are bulky — courier shipping can be uneconomical. Always include freight, off-loading fees, and vulcanizing machine rental in your per-meter cost. Many sellers say “4.0 CNY free shipping.” But they often hide a freight cost of 0.8 CNY/m. This makes it more expensive than a clear quote of 4.5 CNY/m.

Ask, “How are joints handled?”

Water-swelling strips fail mainly at splice points. A supplier offers great value by providing a free vulcanizing machine. They also give on-site technical help and do splices at no extra cost.

Convert “ton → meter” to avoid tricks.

Some sellers quote by kilogram and exploit rubber density to confuse buyers. Use a consistent conversion:

Formula: meter weight (kg) = width (cm) × thickness (cm) × 1.35 × 100

Example (step-by-step): 30×20 mm strip → convert to cm: 3 cm × 2 cm = 6 cm². Then: 3 × 2 × 1.35 × 100 = 810 g = 0.81 kg per meter. If a seller quotes 6.00 CNY/kg, the price per meter = 6.00 × 0.81 = 4.86 CNY/m; a seller who quotes 4.50 CNY/m is actually cheaper.

Price-comparison timeline — suggested workflow

1. Day 1: Collect 5 PDF quotations — normalize to the same spec, tax included, freight included.

2. Day 2: Randomly request samples from 3 suppliers — perform 24-hour swelling tests.

3. Day 3: Video call to check factory stock and vulcanizing machines. Confirm lead time.

4. Day 4: Before ordering, use the lowest competitor quote as an anchor — you can usually negotiate an extra 2–3% off.

4. Seven-step procurement checklist

1. Confirm joint type: construction joint, movement joint, or post-pouring strip.

2. Confirm displacement: for ±20 mm, use a steel-edged swelling strip composite.

3. Confirm water pressure: for >0.4 MPa, choose 400% high-swell formulation.

4. Confirm temperature: northern winter installs need −20 °C non-hardening grades.

5. Calculate quantity: include straight runs, corners, and 10% overlap spares.

6. Ask about tools: Is a vulcanizing machine supplied? Will someone send technicians?

7. Contract Terms:

   • Include “swelling ratio, water pressure resistance, splice strength” in the technical agreement.

   • Allow returns if specifications are not met.

5. Wholesale buy channels — comparison

Channel Advantages, Disadvantages, Best for

1688 (well-established sellers)

• Transparent price comparison

• Credit options

• Variable quality

• Self-pickup often requires attention.

• Small replenishment orders

HC360 / Soglouwang

• Concentrated manufacturers

• Supports tendering

• Information lag

• Inflators can inflate quotes.

• Budget estimation/bidding stage

Local distributors

• Fast local response

• Higher price

• Risk of stockouts

• Emergency repairs

Aohong Sales (direct factory)

• Ex-factory pricing

• On-site technicians

• We must project qualification.

• Large contractors (CR, CCCC, major EPCs)

6. Aohong Rubber Waterstops — Six competitive advantages

1. Dual patented formula:

   • 168-hour swelling retention ≥ 92% (national standard ~80%)

   • Resists dry-wet cycles for 28 days without breaking down.

   (bentonite waterstop strip / water-swelling strip / hydrophilic waterstop)

2. Military-grade dimensional control:

   • Width tolerance: ±0.5 mm

   • Thickness tolerance: ±0.2 mm

   Guaranteed replacement if installation is difficult.

   (rubber waterbar / rubber sealing strip)

3. Fast delivery: standard sizes ≤ 30,000 m shipped within 48 h; custom profiles shipped out within 5 days.

4. Proven projects: zero-leakage performance in 38 major projects. This includes Beijing Metro Line 19, Gongbei Tunnel of the HZMB, and Ningbo Metro Line 2. (Case studies: tunnel and subway applications)

5. Flexible finance: bank guarantees, factoring, and payment terms of 30–90 days to ease general contractors’ cash flow.

7. Customer feedback

“For the same 30×20 mm spec, Aohong’s quote was 0.6 CNY/m lower than another Changzhou factory. We were skeptical, ran three swelling tests — Aohong 305%, the other 240% — so we chose Aohong.” — Liu Cheng, Materials Director, CR14 Ningbo Line 7 Project

8. Get a low price now.

• WeChat: Scan the QR code to add the enterprise account “Aohong Waterstop Direct.” Send your project drawings and quantities. You’ll get an all-tax landed price in 30 minutes.

• Phone: +8618632879676; 24/7 hotline.

• Visit www.rubber-waterstop.com. Submit the form to receive a coupon for a 3-day free trial of the vulcanizing machine.

9. Conclusion

Rubber waterstops make up less than 1% of a project’s total cost. But they ensure 100% waterproofing success. Compare not only price but also swelling ratio, splice technology, and service speed. Aohong Rubber & Plastic provides ex-factory pricing and on-site service. This helps reduce leaks and gives you peace of mind.

— Li Jin, Sales Manager, Aohong Sales Dept., 15 September 2025