Table of Content
Led strips are used widely in the modern world. The waterproofing of light strips was also enhanced to accommodate the increased outdoor use.
This guide will explain the waterproof led strip definition, types, waterproof structures, waterproof IP comparisons, selections, and related questions.
1. LED Strip Waterproof IP Rated Overview
(1) Definition
The waterproof rating for LED strips is a classification of their protection against dust and moisture ingress. This rating is typically indicated by the IP (Ingress Protect) rating.
IP ratings are two-digit numbers that indicate protection against liquids and solid particles, respectively.
(2) Structure of IP Ratings
First Digit (Solid-Particle Protection): Ranging from 0-6 indicating resistance to dust and debris (e.g.).
Second Digit (Liquid protection): Ranges between 0 and 9, which indicates resistance to liquids.
2. LED Strip Waterproof IP Rated Types
(1) Non Waterproof LED Strips(IP20/IP33).
Description: Designed for indoor use with no moisture exposure.
Features:
No or minimal protective coating.
Cost-effective and lightweight.
Applications: Cabinets, home interiors or decorative lighting
(2) Dripproof LED Strips (IP54/55)
Description: Protected against low-pressure dust and water jets.
Construction:
Surface Coating: Silicone resin or epoxy resin is applied on the PCB surface to seal components.
Limitations: Not fully submersible, suitable for damp areas such as kitchens and bathrooms
Applications: Outdoor signs (covered areas), indoor humid zone.
(3) Water Resistant LED Strips
Description: Resistant against dust and water jets in any direction.
Construction:
Semi-Casing: A PVC or silicone tube partially encases a strip of material, leaving spaces for heat dissipation.
Material: Used epoxy resin to provide flexibility and moderate waterproofing.
Applications: Installations outdoors (e.g. garden paths, patios), with indirect rain exposure.
(4) Fully Waterproof LED Strips IP67/IP68
Description: Fully sealed to dust and submersion.
Construction:
Full Encapsulation: The strip is completely enclosed in a PVC or silicone sleeve.
Subtypes:
Sleeve-Only IP67: Submersible for up to 30 minutes at 1 meter. Basic waterproofing using a hollow tube.
Potting (IP68). Fully submersible. Depth varies depending on the manufacturer (typically >=1.5 meters). The sleeve is sealed with silicone or epoxy resin. This offers superior moisture resistance, but reduces flexibility.
Applications: Submerged Lighting (e.g. pools, fountains), harsh environments outdoors
3. Materials Used to Make Waterproof LED Strips
(1) Epoxy Resin/PU Potting Compounds:
Low cost, but it is prone to yellowing outdoors after 2-3 years. They are suitable for humid indoor or short-term outdoor applications due to their reduced flexibility after curing.
(2) Silicone-Based Systems:
Coating (IP65), a thin layer of silicone coats the PCB. This provides UV resistance, flexibility, and is ideal for curved installations, such as furniture edges.
Sleeve (IP67). Thick-walled, silicone tubing that provides protection from minor impacts, as well as wear resistance.
Potting Compound IP68: This high-grade silicone filler is resistant to extreme temperatures (from -45degC up to 200degC), as well as seawater corrosion. It’s ideal for industrial or deep-sea environments.
(3) Nano Coating (e.g. Parylene) IP65+:
An ultra-thin 10-100mm film, formed by chemical vapor deposit (CVD), penetrates micro-gaps, e.g. solder joints, without impeding the heat dissipation. Used in precision equipment such as marine lighting.
4. Waterproof LED Strip Structure
(1) Heat Shrink Tubing Sealing:
Heat-shrink tube is used to seal connection points. It can be combined with silicone sealant on the ends for IP65+ protection. Often used for DIY outdoor wiring.
(2) Waterproof Connectors:
Molded silicone connectors are equipped with O-rings to provide IP67 dust and water resistance. This eliminates the risk of exposed solder joints. Ideal for situations requiring frequent disassembly.
(3)Aluminum Waterproof Channels:
Aluminum profiles extruded with silicone gaskets provide dual protection IP67 and heat dissipation. This is the preferred choice for LED strips with high power.
5. The Main Differences Between IP67 LED Strips and IP68 LED Strips
IP67 and IP68 are distinguished by their resistance to water immersion and durability for specific applications. They both have the same dustproof rating (IP6X), however, their liquid protection abilities are different.
(1) Water Immersion Resistance
| IP Rating | Protection Level | Test Conditions |
| IP67 | Temporary immersion in water (up to 1 meter depth) for 30 minutes. | Submerged in 1m of water for 30 minutes. |
| IP68 | Continuous / prolonged immersion in water (exceeding 1 meter depth) as specified by the manufacturer. | Depth and duration vary by product (e.g., 2m for 24 hours or 3m indefinitely). |
(2) Construction and Sealing
IP67:
To create an airtight seal, use silicone sleeves or epoxy resin pots.
Ideal for submerged environments (e.g. garden ponds and outdoor fountains).
IP68:
Uses high-grade potting compound (e.g. silicone gel) to ensure full encapsulation.
For permanent underwater use, e.g. pools, aquariums and marine lighting.
(3) Application Scenarios
(4) Durability and Cost
IP67:
Cost savings (20-30% less than IP68)
Limit exposure to short intervals of water; prolonged immersion can cause seal failure.
IP68:
Costs higher up front but lifespan longer in extreme conditions.
Resists chemicals, saltwater and high-pressure washing.
(5) Installation Considerations
IP67:
Avoid using high-pressure direct water jets, such as power washers.
Seal connectors with silicone grease.
IP68:
Verify the manufacturer’s defined immersion limits (e.g. depth/duration).
For saltwater applications, use corrosion-resistant materials such as stainless steel mountings.
6. Guideline for Selecting IP ratings
(1) Dry Indoor Environments (e.g. Bedrooms, Offices, etc.):
IP20/IP33 – Economical, as no waterproofing is required.
(2) Humid Indoor Areas:
IP54/IP55: Resists splashes, steam and vapor.
(3) Semi Protected Outdoor Areas (e.g. Balconies, Covered Pathways):
IP65 (resists rainwater splashes, avoids direct exposure).
(4) Unprotected/Extreme Outdoor Environments (e.g., Gardens, Building Facades):
IP67/IP68: (withstands heavy rainfall, hail or prolonged moisture).
(5) Submerged and High-Pressure Setting (e.g. Pools, Industrial Facilities, etc.):
IP68 (fully sealed and resistant to high pressure impacts).
7. Connect Waterproof LED Strips with Silicone Glue
8. FAQs about Waterproof LED Strips
9. You Can Read More about It Here:
Waterproof light strips will continue to grow, thanks to technological advances, urbanization and government support. Innovation in materials and technologies, which will overcome challenges such as cost and competition, will open up new applications for smart cities, underwater environments, cultural tourism and other areas. Leading companies in this dynamic industry are likely to be those that prioritize R&D and sustainability strategies, as well as niche market strategies.
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