Formwork Plug - Hole Sealing Expert for Flawless Concrete Projects

As a leading manufacturer in construction accessories, Shaanxi Flourish Industrial Co., Ltd. developed this Formwork Plug, backed by ISO 9001 quality system and precision injection molding technology. With "triple-seal anti-leakage + full-scene compatibility" as its core advantages, it is made of modified PP/TPR composite material, compatible with all types of formwork holes such as aluminum, steel, and wood formwork. It completely solves the industry pain points of traditional sealing methods, such as "frequent leakage, cumbersome installation, and low reuse rate". It has served more than 2,000 high-rise residential and bridge projects worldwide and was rated as "essential accessory for formwork construction quality control".

1.1 Triple-Seal Structure, Zero Leakage Guarantee

Innovatively adopting a "tapered body + double anti-slip ribs + sealing lip" triple anti-leakage design: the tapered body forms an interference fit with the hole, achieving a 99% fit; double spiral anti-slip ribs increase friction with the formwork, with a static friction coefficient of ≥0.6; the 0.8mm thick elastic sealing lip at the top tightly fits the formwork surface under concrete pressure, forming a seamless seal. After 100 concrete pouring tests, there was no leakage around the holes, completely eliminating quality problems such as column root honeycombs and surface voids, reducing post-plastering repair time by 80%.

1.2 Modified Material Upgrade, 3x Durability

Made of anti-aging modified PP/TPR composite material, combining the rigidity of polypropylene and the elasticity of thermoplastic rubber, with a Shore hardness of 75D at room temperature and a tensile strength of ≥25MPa, far exceeding ordinary PP material (tensile strength ≤18MPa). The temperature resistance range covers -30℃ to 85℃, adapting to winter construction in northern regions and high-temperature pouring in summer; the surface is UV-resistant, with no embrittlement after 12 months of outdoor storage. Each plug can be reused more than 15 times, 3 times that of ordinary plastic plugs, significantly reducing accessory procurement costs.

1.3 Full-Scene Compatibility, Covering 95% of Hole Requirements

Offering 12 standard specifications from Φ8-Φ60mm, it is compatible with mainstream hole types such as tie rod holes (Φ12-Φ20mm), line release holes (Φ25-Φ30mm), and material transfer holes (Φ40-Φ60mm), as well as all types of formwork including Doka aluminum formwork, film-coated wood formwork, and Q235 steel formwork. For special size requirements, 72-hour rapid customization is supported, and the product structure can be adjusted according to hole shapes (circular, square) to adapt to non-standard scenarios such as cantilevered I-beam reserved holes, eliminating the need to purchase multiple specifications of accessories and reducing inventory pressure.

1.4 10-Second Quick Installation & Removal, Doubling Construction Efficiency

Adopting a "tool-free press-fit installation" design, simply align the plug with the hole and press lightly to complete installation, taking only 10 seconds per operation, saving 90% of working hours compared to traditional tape sealing; removal can be done by prying the top groove with an ordinary screwdriver, leaving no residue and no damage to the formwork. It is compatible with formwork thickness of 5-30mm, with an axial pull-out force of ≥150N after installation, and does not fall off even when subjected to a lateral pressure of 0.8MPa during pouring, solving the problem of "concrete jamming due to plug falling off".

3.1 Sealing Core: Tapered Body & Elastic Lip

The tapered body adopts a 1:15 taper design, adapting to holes with different tolerances (±0.5mm) to ensure full fit with the hole wall; the top elastic lip is made of TPR soft rubber with a Shore hardness of 35A, having excellent compression rebound performance. It deforms by 15% under concrete lateral pressure and quickly recovers after pressure relief, ensuring sealing effect during reuse.

3.2 Fixing Core: Double Spiral Anti-Slip Ribs

The ribs are 1.2mm high and 3mm apart, distributed in a spiral pattern. During installation, they form multi-point engagement with the hole wall, effectively preventing plug loosening due to vibration during pouring. The rib surface has fine anti-slip lines, further increasing friction resistance and maintaining stability even in smooth aluminum formwork holes.

3.3 Durability Core: Modified Material & One-Piece Molding

Using Bayer modified PP raw material with added antioxidants and UV absorbers, after 1000 hours of 80℃ high-temperature aging test, the tensile strength retention rate is ≥90%; precision injection molding ensures no seams or bubbles, avoiding sealing failure due to structural defects, and adapting to harsh construction environments such as humidity and dust.